Implementation And Analysis of a 5v Rechargeable Power Supply for Microcontroller-Based Application

This paper presents a cost-effective, easy-to-implement, and efficient 5V rechargeable power supply solution for microcontroller unit-based (MCU-based) applications. The 5V rechargeable system consist of an XL4015, 5V DC-DC Bulk Converter and a four series (4S) 40A Battery Management System (BMS). The system is designed to provide a regulated 5V output, making it ideal for portable or remote MCU-based applications where continuous power supply is essential. The system provides safety features, including short circuit and overcurrent protection, to prevent damage to the MCU or other connected devices. The system was tested for performance under no load and on-load conditions, demonstrating its ability to deliver stable voltage and maintain charging efficiency. From the results obtained, the system provides a constant 5V when the system is subjected to varying voltages from a variable power source and from a four series (4S) 40A Battery Management System (BMS). The results show that the system worked perfectly well. The system is versatile and can be applied to a wide range of projects, particularly in portable and off-grid scenarios.